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Data

SEC EDGAR Form 4 ↗
CongressStock.com ↗
Track13F.com ↗
About the data

© 2026 InsiderTradingScreener.com. Data from SEC EDGAR Form 4 filings.For informational purposes only. Not financial advice.

Home/Companies/NPK INTERNATIONAL INC

NPK INTERNATIONAL INC

20 insider trades tracked

NPKI

Insider trades

20

Total bought

$726K

Total sold

$3M

Unique insiders

6

Recent insider trades

Most recent Form 4 filings for NPK INTERNATIONAL INC.

Piontek Greggsold15,000 shares ofNPKIat $15.026$225KMar 26Details
Fruge Mary Celestesold1,000 shares ofNPKIat $13.56$14KMar 18Details
Fruge Mary Celesteexercised1,000 shares ofNPKIat $4.32$4KMar 18Details
Fruge Mary Celestesold11,193 shares of

Insiders at this company

Executives and directors who have filed Form 4s.

LANIGAN MATTHEW5 trades
Piontek Gregg4 trades
Fruge Mary Celeste4 trades
Briggs Lori3 trades
Lewis Michael A3 trades
MINGE JOHN C1 trades

at $13.339

$149KMar 10Details

Fruge Mary Celesteexercised11,193 shares ofNPKIat $4.32$48KMar 10Details

Piontek Greggsold35,000 shares ofNPKIat $14.017$491KMar 5Details

Piontek Greggsold73,590 shares ofNPKIat $14.098$1MMar 5Details

Piontek Greggexercised73,590 shares ofNPKIat $4.32$318KMar 5Details

Lewis Michael Asold2,013 shares ofNPKIat $14.305$29KFeb 25Details

Lewis Michael Asold2,013 shares ofNPKIat $12$24KNov 25Details

LANIGAN MATTHEWgifted770,249 shares ofNPKIat $0Oct 6Details

Briggs Lorisold10,108 shares ofNPKIat $11.511$116KOct 3Details

LANIGAN MATTHEWsold1,000 shares ofNPKIat $10.38$10KSep 4Details

LANIGAN MATTHEWexercised1,000 shares ofNPKIat $4.32$4KSep 4Details

Lewis Michael Asold2,013 shares ofNPKIat $10.331$21KAug 26Details

LANIGAN MATTHEWsold68,896 shares ofNPKIat $10.342$713KAug 26Details

LANIGAN MATTHEWexercised68,896 shares ofNPKIat $4.32$298KAug 26Details

Briggs Lorisold8,005 shares ofNPKIat $9.513$76KAug 12Details

Briggs Lorisold8,005 shares ofNPKIat $8.568$69KJul 10Details

MINGE JOHN Cbought10,000 shares ofNPKIat $5.38$54KMar 6Details

NPK INTERNATIONAL INC (NPKI) — Insider Trading Activity | Insider Trading Screener